2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
27 #include <QApplication>
30 #include <QFormLayout>
31 #include <QGridLayout>
36 #include "analogsignal.hpp"
37 #include "pv/data/analog.hpp"
38 #include "pv/data/analogsegment.hpp"
39 #include "pv/data/signalbase.hpp"
40 #include "pv/view/view.hpp"
42 #include <libsigrokcxx/libsigrokcxx.hpp>
47 using std::shared_ptr;
54 const QColor AnalogSignal::SignalColours[4] = {
55 QColor(0xC4, 0xA0, 0x00), // Yellow
56 QColor(0x87, 0x20, 0x7A), // Magenta
57 QColor(0x20, 0x4A, 0x87), // Blue
58 QColor(0x4E, 0x9A, 0x06) // Green
61 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40*256/100);
62 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20*256/100);
64 const float AnalogSignal::EnvelopeThreshold = 256.0f;
66 const int AnalogSignal::MaximumVDivs = 10;
67 const int AnalogSignal::MinScaleIndex = -6;
68 const int AnalogSignal::MaxScaleIndex = 7;
70 const int AnalogSignal::InfoTextMarginRight = 20;
71 const int AnalogSignal::InfoTextMarginBottom = 5;
73 AnalogSignal::AnalogSignal(
75 shared_ptr<data::SignalBase> base) :
76 Signal(session, base),
77 scale_index_(4), // 20 per div
78 scale_index_drag_offset_(0),
79 div_height_(3 * QFontMetrics(QApplication::font()).height()),
85 pv::data::Analog* analog_data =
86 dynamic_cast<pv::data::Analog*>(data().get());
88 connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
89 this, SLOT(on_samples_added()));
91 base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
95 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
97 return base_->analog_data();
100 void AnalogSignal::save_settings(QSettings &settings) const
102 settings.setValue("pos_vdivs", pos_vdivs_);
103 settings.setValue("neg_vdivs", neg_vdivs_);
104 settings.setValue("scale_index", scale_index_);
105 settings.setValue("autoranging", autoranging_);
108 void AnalogSignal::restore_settings(QSettings &settings)
110 if (settings.contains("pos_vdivs"))
111 pos_vdivs_ = settings.value("pos_vdivs").toInt();
113 if (settings.contains("neg_vdivs"))
114 neg_vdivs_ = settings.value("neg_vdivs").toInt();
116 if (settings.contains("scale_index")) {
117 scale_index_ = settings.value("scale_index").toInt();
121 if (settings.contains("autoranging"))
122 autoranging_ = settings.value("autoranging").toBool();
125 std::pair<int, int> AnalogSignal::v_extents() const
127 const int ph = pos_vdivs_ * div_height_;
128 const int nh = neg_vdivs_ * div_height_;
129 return make_pair(-ph, nh);
132 int AnalogSignal::scale_handle_offset() const
134 const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
136 return ((scale_index_drag_offset_ - scale_index_) *
140 void AnalogSignal::scale_handle_dragged(int offset)
142 const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
144 scale_index_ = scale_index_drag_offset_ -
145 (offset + h / 2) / (h / 4);
150 void AnalogSignal::scale_handle_drag_release()
152 scale_index_drag_offset_ = scale_index_;
156 void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
158 if (base_->enabled()) {
159 Trace::paint_back(p, pp);
160 paint_axis(p, pp, get_visual_y());
164 void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
166 assert(base_->analog_data());
169 const int y = get_visual_y();
171 if (!base_->enabled())
174 paint_grid(p, y, pp.left(), pp.right());
176 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
177 base_->analog_data()->analog_segments();
178 if (segments.empty())
181 const shared_ptr<pv::data::AnalogSegment> &segment =
184 const double pixels_offset = pp.pixels_offset();
185 const double samplerate = max(1.0, segment->samplerate());
186 const pv::util::Timestamp& start_time = segment->start_time();
187 const int64_t last_sample = segment->get_sample_count() - 1;
188 const double samples_per_pixel = samplerate * pp.scale();
189 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
190 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
192 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
193 (int64_t)0), last_sample);
194 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
195 (int64_t)0), last_sample);
197 if (samples_per_pixel < EnvelopeThreshold)
198 paint_trace(p, segment, y, pp.left(),
199 start_sample, end_sample,
200 pixels_offset, samples_per_pixel);
202 paint_envelope(p, segment, y, pp.left(),
203 start_sample, end_sample,
204 pixels_offset, samples_per_pixel);
207 void AnalogSignal::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
212 const int y = get_visual_y();
214 // Show the info section on the right side of the trace
215 const QString infotext = QString("%1 V/div").arg(resolution_);
217 p.setPen(base_->colour());
218 p.setFont(QApplication::font());
220 const QRectF bounding_rect = QRectF(pp.left(),
221 y + v_extents().first,
222 pp.width() - InfoTextMarginRight,
223 v_extents().second - v_extents().first - InfoTextMarginBottom);
225 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
228 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
230 p.setRenderHint(QPainter::Antialiasing, false);
232 if (pos_vdivs_ > 0) {
233 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
234 for (int i = 1; i <= pos_vdivs_; i++) {
235 const float dy = i * div_height_;
236 p.drawLine(QLineF(left, y - dy, right, y - dy));
239 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
240 for (int i = 0; i < pos_vdivs_; i++) {
241 const float dy = i * div_height_;
242 const float dy25 = dy + (0.25 * div_height_);
243 const float dy50 = dy + (0.50 * div_height_);
244 const float dy75 = dy + (0.75 * div_height_);
245 p.drawLine(QLineF(left, y - dy25, right, y - dy25));
246 p.drawLine(QLineF(left, y - dy50, right, y - dy50));
247 p.drawLine(QLineF(left, y - dy75, right, y - dy75));
251 if (neg_vdivs_ > 0) {
252 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
253 for (int i = 1; i <= neg_vdivs_; i++) {
254 const float dy = i * div_height_;
255 p.drawLine(QLineF(left, y + dy, right, y + dy));
258 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
259 for (int i = 0; i < neg_vdivs_; i++) {
260 const float dy = i * div_height_;
261 const float dy25 = dy + (0.25 * div_height_);
262 const float dy50 = dy + (0.50 * div_height_);
263 const float dy75 = dy + (0.75 * div_height_);
264 p.drawLine(QLineF(left, y + dy25, right, y + dy25));
265 p.drawLine(QLineF(left, y + dy50, right, y + dy50));
266 p.drawLine(QLineF(left, y + dy75, right, y + dy75));
270 p.setRenderHint(QPainter::Antialiasing, true);
273 void AnalogSignal::paint_trace(QPainter &p,
274 const shared_ptr<pv::data::AnalogSegment> &segment,
275 int y, int left, const int64_t start, const int64_t end,
276 const double pixels_offset, const double samples_per_pixel)
278 p.setPen(base_->colour());
280 QPointF *points = new QPointF[end - start];
281 QPointF *point = points;
283 pv::data::SegmentAnalogDataIterator* it =
284 segment->begin_sample_iteration(start);
286 for (int64_t sample = start; sample != end; sample++) {
287 const float x = (sample / samples_per_pixel -
288 pixels_offset) + left;
290 *point++ = QPointF(x, y - *((float*)it->value) * scale_);
291 segment->continue_sample_iteration(it, 1);
293 segment->end_sample_iteration(it);
295 p.drawPolyline(points, point - points);
300 void AnalogSignal::paint_envelope(QPainter &p,
301 const shared_ptr<pv::data::AnalogSegment> &segment,
302 int y, int left, const int64_t start, const int64_t end,
303 const double pixels_offset, const double samples_per_pixel)
305 using pv::data::AnalogSegment;
307 AnalogSegment::EnvelopeSection e;
308 segment->get_envelope_section(e, start, end, samples_per_pixel);
313 p.setPen(QPen(Qt::NoPen));
314 p.setBrush(base_->colour());
316 QRectF *const rects = new QRectF[e.length];
317 QRectF *rect = rects;
319 for (uint64_t sample = 0; sample < e.length-1; sample++) {
320 const float x = ((e.scale * sample + e.start) /
321 samples_per_pixel - pixels_offset) + left;
322 const AnalogSegment::EnvelopeSample *const s =
325 // We overlap this sample with the next so that vertical
326 // gaps do not appear during steep rising or falling edges
327 const float b = y - max(s->max, (s+1)->min) * scale_;
328 const float t = y - min(s->min, (s+1)->max) * scale_;
331 if (h >= 0.0f && h <= 1.0f)
333 if (h <= 0.0f && h >= -1.0f)
336 *rect++ = QRectF(x, t, 1.0f, h);
339 p.drawRects(rects, e.length);
345 float AnalogSignal::get_resolution(int scale_index)
347 const float seq[] = {1.0f, 2.0f, 5.0f};
349 const int offset = std::numeric_limits<int>::max() / (2 * countof(seq));
350 const std::div_t d = std::div(
351 (int)(scale_index + countof(seq) * offset),
354 return powf(10.0f, d.quot - offset) * seq[d.rem];
357 void AnalogSignal::update_scale()
359 resolution_ = get_resolution(scale_index_);
360 scale_ = div_height_ / resolution_;
363 void AnalogSignal::perform_autoranging(bool force_update)
365 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
366 base_->analog_data()->analog_segments();
368 if (segments.empty())
371 static double prev_min = 0, prev_max = 0;
372 double min = 0, max = 0;
374 for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
375 std::pair<double, double> mm = segment->get_min_max();
376 min = std::min(min, mm.first);
377 max = std::max(max, mm.second);
380 if ((min == prev_min) && (max == prev_max) && !force_update)
386 // Use all divs for the positive range if there are no negative values
387 if ((min == 0) && (neg_vdivs_ > 0)) {
388 pos_vdivs_ += neg_vdivs_;
392 // Split up the divs if there are negative values but no negative divs
393 if ((min < 0) && (neg_vdivs_ == 0)) {
394 neg_vdivs_ = pos_vdivs_ / 2;
395 pos_vdivs_ -= neg_vdivs_;
398 double min_value_per_div;
399 if ((pos_vdivs_ > 0) && (neg_vdivs_ > 0))
400 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
401 else if (pos_vdivs_ > 0)
402 min_value_per_div = max / pos_vdivs_;
404 min_value_per_div = -min / neg_vdivs_;
406 // Find first scale value that is bigger than the value we need
407 for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
408 if (get_resolution(i) > min_value_per_div) {
416 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
418 // Add the standard options
419 Signal::populate_popup_form(parent, form);
421 QFormLayout *const layout = new QFormLayout;
423 // Add the number of vdivs
424 QSpinBox *pvdiv_sb = new QSpinBox(parent);
425 pvdiv_sb->setRange(0, MaximumVDivs);
426 pvdiv_sb->setValue(pos_vdivs_);
427 connect(pvdiv_sb, SIGNAL(valueChanged(int)),
428 this, SLOT(on_pos_vdivs_changed(int)));
429 layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb);
431 QSpinBox *nvdiv_sb = new QSpinBox(parent);
432 nvdiv_sb->setRange(0, MaximumVDivs);
433 nvdiv_sb->setValue(neg_vdivs_);
434 connect(nvdiv_sb, SIGNAL(valueChanged(int)),
435 this, SLOT(on_neg_vdivs_changed(int)));
436 layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb);
438 // Add the vertical resolution
439 resolution_cb_ = new QComboBox(parent);
441 for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
442 const QString label = QString("%1").arg(get_resolution(i));
443 resolution_cb_->insertItem(0, label, QVariant(i));
446 const int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
447 resolution_cb_->setCurrentIndex(cur_idx);
449 connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
450 this, SLOT(on_resolution_changed(int)));
452 QGridLayout *const vdiv_layout = new QGridLayout;
453 QLabel *const vdiv_unit = new QLabel(tr("V/div"));
454 vdiv_layout->addWidget(resolution_cb_, 0, 0);
455 vdiv_layout->addWidget(vdiv_unit, 0, 1);
457 layout->addRow(tr("Vertical resolution"), vdiv_layout);
459 // Add the autoranging checkbox
460 QCheckBox* autoranging_cb = new QCheckBox();
461 autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
463 connect(autoranging_cb, SIGNAL(stateChanged(int)),
464 this, SLOT(on_autoranging_changed(int)));
466 layout->addRow(tr("Autoranging"), autoranging_cb);
468 form->addRow(layout);
471 void AnalogSignal::on_samples_added()
473 perform_autoranging();
476 // Call order is important, otherwise the lazy event handler won't work
477 owner_->extents_changed(false, true);
478 owner_->row_item_appearance_changed(false, true);
482 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
487 perform_autoranging(true);
490 // Call order is important, otherwise the lazy event handler won't work
491 owner_->extents_changed(false, true);
492 owner_->row_item_appearance_changed(false, true);
496 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
501 perform_autoranging(true);
504 // Call order is important, otherwise the lazy event handler won't work
505 owner_->extents_changed(false, true);
506 owner_->row_item_appearance_changed(false, true);
510 void AnalogSignal::on_resolution_changed(int index)
512 scale_index_ = resolution_cb_->itemData(index).toInt();
516 owner_->row_item_appearance_changed(false, true);
519 void AnalogSignal::on_autoranging_changed(int state)
521 autoranging_ = (state == Qt::Checked);
524 perform_autoranging(true);
527 // Call order is important, otherwise the lazy event handler won't work
528 owner_->extents_changed(false, true);
529 owner_->row_item_appearance_changed(false, true);
533 } // namespace TraceView